I have a Colt 4x mounted on my SP2 Target Model, its one of those "I'm gonna use it cause I paid too much for it" things, the set up is solid and accurate, problem as previously mentioned is the cheek weld eye position, takes a little getting used to. I have a Blackhawk (inexpensive) cheek pad that really makes it more effective but can't use iron sights with it cause it positions my eye too high. Several dead coyotes attest to its accuracy and effectiveness but I'm determmined to use it. Try one out first.
rk